Eeshall

(?•??-)?
.both starts with school
.both guys were transfer students
.both couple help each other to get to the top university( in this drama the guy went to the uni while in the other the guy didn't)
.both dramas show life after university life .

It gives the vibe of this movie at the start.
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contract marriage ( feelings developed after marriage in perfect and casual )
In love in time the guy had feelings for the FL before contract .
2 .In perfect and casual the contract was because of ml grandpa
And in love in time the contract was because of FL dad